Update: Got an e-mail back from Motobecane USA today. They're not interested in helping me out with this. The message was longer but it boils down to this:

"In order to qualify for replacement under warranty, a frame must be rendered in-operable or unsafe by an inherent defect not caused by external forces."

Before I got their reply, I was feeling a little optimistic after reading the warranty page, but I shouldn't have. This is their intro on the warranty page:

"At Motobecane USA, we are proud to produce the highest quality bicycles available and back them up with one of the best warranties in the bicycle industry. High grade bikes rarely have manufacturing defects, few cyclists ever encounter a defective bicycle, and Motobecane USA has quality control that almost completely eliminates defects." Hmm, not so much.